| LA-ICPMS Zircon U-Pb Dating in the Jurassic Daohugou Beds and Correlative Strata in Ningcheng of Inner Mongolia |
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| 作者姓名： | LIU Yanxue LIU Yongqing ZHANG Hong |
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| 作者单位： | [1]Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 [2]Key Laboratory of Insect Evolution and Environmental Changes, Capital Normal University, Beijing 100037 [3]Shenyang Institute of Geology and Minerals Resources, China Geol |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | LA-ICPMS Zircon U-Pb dating is applied to volcanic rocks overlying and underlying the Salamander-bearing bed in the Daohugou beds of Ningcheng in Inner Mongola and Reshuichang of Lingyuan and Mazhangzi of Jianping in western Liaoning. The results indicate that the youngest age of the rocks in Daohugou of Ningcheng is 158 Ma, and the oldest one is 164 Ma. Synthesized researches indicate that the salamander-bearing beds in Daohugou of Ningcheng, Reshuichang of Lingyuan and Mazhangzi of Jianping were developed in the same period. The Daohugou beds were formed in the geological age of 164-158 Ma of the middle-late Jurassic. Whilst, the Daohugou beds and its corrdative strata should correspond to the Tiaojishan Formation （or Lanqi Formation） of the middle Jurassic in northern Hebei Province and western Liaoning Province, based on the disconformity between the Daohugou beds and its overlaying beds of the Tuchengzi Formation of Late Jurassic and the Jehol Beds of early Cretaceous, and the disconformity between the Daohugou Beds and its underlying Jiulongshan Formation, which is composed of conglomerate, sandstone, shale with coal and thin coal beds.
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| 关 键 词： | 内蒙古 锆石 LA-ICPMS 煤 地质结构 侏罗纪 |
| 收稿时间： | 2006-06-23 |
| 修稿时间： | 2006-08-11 |
LA-ICPMS Zircon U-Pb Dating in the Jurassic Daohugou Beds and Correlative Strata in Ningcheng of Inner Mongolia |
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| Authors: | LIU Yanxue LIU Yongqing and ZHANG Hong Institute of Geology Chinese Academy of Geological Sciences Beijing Key Laboratory of Insect Evolution and Environmental Changes Capital Normal University Beijing Shenyang Institute of Geol |
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| Abstract: | LA-ICPMS Zircon U-Pb dating is applied to volcanic rocks overlying and underlying the Salamander-bearing bed in the Daohugou beds of Ningcheng in Inner Mongola and Reshuichang of Lingyuan and Mazhangzi of Jianping in western Liaoning.The results indicate that the youngest age of the rocks in Daohugou of Ningcheng is 158 Ma,and the oldest one is 164 Ma.Synthesized researches indicate that the salamander-bearing beds in Daohugou of Ningcheng,Reshuichang of Lingyuan and Mazhangzi of Jianping were developed in the same period.The Daohugou beds were formed in the geological age of 164-158 Ma of the middle-late Jurassic.Whilst,the Daohugou beds and its correlative strata should correspond to the Tiaojishan Formation(or Lanqi Formation)of the middle Jurassic in northern Hebei Province and western Liaoning Province,based on the disconformity between the Daohugou beds and its overlaying beds of the Tuchengzi Formation of Late Jurassic and the Jehol Beds of early Cretaceous,and the disconformity between the Daohugou Beds and its underlying Jiulongshan Formation,which is composed of conglomerate,sandstone,shale with coal and thin coal beds. |
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| Keywords: | Inner Mongolia Liaoning Daohugou Beds Zircon U-Pb dating LA-ICPMS TiaojishanFormation Jurassic |
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